Inclosed-electric-arc lamp.



M. K'O'RTING.

INGLOSED ELECTRIC ARC LAMP.

APPLICATION FILED 13110.5, 1910.

Patented Jan. 13, 1914.

Wwavw I have discovered that it be kept tree from deposit turning gasesstnl adapted to cool the nrrnn STATES PATENT orrron MAX KijRTING, OFLEUTZSCH, NEAR LEIPZIG, GERMANY, ASSIGNOB TO KURTING 80 I1V1.A'll-IIESEN AKTIENGESELLSCHAFT, OF LEUTZSCH, NEAR LEIPZIG, GERMANY.

INCLOSED-ELECTRIC-ABC LAMP.

Application filed December Patented Jan. 13, 1914.

0111mm it may concern:

do it known that 1 MAX Ktiuti'nzo, a subject oitthe German l hnperor,residing at Bahi'ihofstrassc, Lcutzsch, near Leipzig, German; haveinvented a new and useful inl (,Chl i C L KYC Lamp of which the follg isa specification. v .Many arrange is have been proposed for the purpose.t' preventing deposit on the transparent globe of closed.- elcctric arclamps, the electrodior wh ch emit :oi's capable of lflftifittfil it oncooling.

This invention ed electric arc lamps in whic l t. space or chamber issituated above the combustion chamber and in which tl charged with thevapors pass out of the top of the coml'mstion chamber and pass in z p inat the top 0; said chaiinber after passing through the depositing space.it has been found that in a lamp p or this type the walls of thetransparent portions of the lamp can even when the to charged withconsiderable quantities of vapor it the walls of the combustion chamberare exposed directly to the major portion of the rays of the arc and thedepositing space or chamber is in an eiiicient manner or to such extentthat when they reenter the'combustiou chainb -u their temperature isconsiderably below that of the transparent portions of the lamp.

is essential for the Walls of the combustion chamber to be heated to ahigher temperature than that of the returning cooled gases in order thatno deposit may take place thereon. It is necessary for the walls of thecombustion chamber to be exposed to the major portion of the rays of theare in order that they may become suflicicntly heated and therefore thecombustion chamber is surrounded with an outer globe in order to preventloss of heat.

' One of the important advantages of this invention is that whereasusuall it is sought to prevent deposit by so forming the dcpositingchamber that the returning gases should be as free as possible fromvapors, this is unnecessary for even when the rc turning cooled gasescontainconsiderable. quantities ofmatter cap bio of deposition a depositwill not take place if the conditions hereinbefore set out havebcenobserved.

The drawing shows an inclosed are lamp of the usual flame are typecontaining minoralizcd electrodes. 7

1 designates a b0}: containing the ele r- 'trtide-controlling mechanismwhich may be of any we'll :nown construction. A cap covers this boX andprovided with a pulley 3 by means of which the lamp may he sus pended. Asu tiporting plat -1: is suspended from the cap 52 by means ids 5,pivoted to lugs it on the plate. l glate supports an outer casing orcylinder (Z having at tachcd at its lower end a ring; ti -'hicli covoperates with a ring 7 tie ii ,6 and T being clamped togcthcr by meansof bolts 8 and nuts 9. An end cap 10 prcwidod with a ring 1.1. issupported :tron'i the ripg 1" by means of a series of bolts 12 and nuts13. The rings 7 and 11 support cylinder or chimney a and a globe 6 bothof which are transparent and the ring 7 also supports the reflector 14.

Electrodes E are supported in any suit able manner. A cylinder 0 issupported from the plate s and an inner cylinder 0 is also preferablyprovided to protect the upper electrode The cylinders (Z, c and 6 form aplurality of annular passages which are connectedat their upper ends byopen ings c and which open at their lower ends into the upper end of thecombustion chamher formed by the walls of the chimney a. The cylinders(L c, and 6 form a depositing device or chamber which is located" abovethe combustion chamber and thus does notinterfere with the distributionof the light from the are and they serve tocool the vapors passingthrough them to a considerable extent below the temperature of thetransparent chimney a. Heated gases pass upward through the space formedby the coc and down the space formed by the casing I from thence againinto the top of the combustion chamber at. a part nearer to the'wallschamber than the cylinot the combustion der 0.

The walls of the combustion chamber are exposed to the direct rays ofthe are so that these walls are heated to a higher temperature than theentering gases or vapors whereby deposits on the walls are prevented.The provision of the globeb well as the air space formed between theglobe and -.chimncy will prevent cooling of the chimney. The cooledgases entering the -combusthereon.

thegases and vapors ilpwardly from-"the arcand apassage leadingsaidgases and vapors downwal'd to the combustion chamber close to the heatedwalls thereof forreturning the gases and vapors at a relatively lowtemperature to tl omhustion chamber, and a transparent can combustionchambenior conserving the heat thereof to suchan extent as to preventdeposits there'oit; Y

2. In an in l se d arclamp the c'ombina tion with aset'ti'felectrodesforming an arc,

of a cooling chamber above the arc. adapted to cool the gases arisingtherefrom, a combustion chambbr into which'the cooled gases passdownwardly from the cooling chamber and which has cylindricaltransparent walls a surroundin the arc in such proximitythereto thatadifierential temperature in the cooling and combustion chambers isprovided inc-losing the walls of the 1 gases 'and vapors entering fromthe cooling chamber.

3. In an inclosed arc lamp, the combination with a set of electrodesforming an arc of a combustion chamber for the are having transparentwalls exposed tothe direct rays of the arc and heated thereby to arelatively high temperature, and a cooling chamber above the are havinga passage tor leading the gases and vapors upwardly from the arc and apassage for leading said gases and vapors downward to the combustionchamber close to the heated walls thereof for returning the gases andvapors at a relatively low temperature to the combustion chamber, and aglobe or transparent casing inclosing-the walls of the combustionchamber for conservirig the heat thereof.

MAX KoR'rING.

Witnesses:

PAUL HEYCK, RUDOLPH FRIGILE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patenul -Wash1ngton, D. O. I

